/Engine/Source/Runtime/Landscape/Classes/LandscapeComponent.h
Replaces one layerinfo on this component with another
void ReplaceLayerInternal ( [ULandscapeLayerInfoObject](API\Runtime\Landscape\ULandscapeLayerInfoObject) * FromLayerInfo, [ULandscapeLayerInfoObject](API\Runtime\Landscape\ULandscapeLayerInfoObject) * ToLayerInfo, [FLandscapeEditDataInterface](API\Runtime\Landscape\FLandscapeEditDataInterface) & LandscapeEdit, const [FGuid](API\Runtime\Core\Misc\FGuid) & InEditLayerGUID )